A major tragedy has been averted today after Air India 91643 Delhi to Jaipur flight, which caught fire soon after taking off from the Indira Gandhi International Airport in New Delhi, landed back at the Delhi airport. All 59 passengers are safe and have been evacuated from an emergency exit. Air India said, "Due to the problem in nose landing gear and some material failure Delhi-Jaipur flight (9X 643) made an emergency landing.